Edger



(No Model.) I 3 SheetsSheet 1.

J. A. ROBB.

EDGBR.

N0. 290,358. Patented Dec. 18, 1883.

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(No Model.) 3 'SheetsSheet 2.

' J. A. ROBE.

BDG R. No. 290,358. Patented Dec. 18, 1883.

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3 Sheets-Sheet 3. J. A. ROBB.

(No Model.)

EDGER.

Patented Dec. 18

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' UNITED STATES.

PATENT @Frrcn.

JAMES A. ROBE, or SAN-FRANCISCO, CALIFORNIA.

EDGER.

SPECIFICATION forming part of Letters Patent No. 290,358, dated December 18, 1883.

Application filed August 522, 1883.

To all whom it may concern.-

Be it known that I, JAMES A. ROBB, of the city of San Francisco, county of San Francisco, and State of California, have invented an Improvement in Edgers; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to certain improvements in that class of machines for resawing 1o lumber into scantling,studding,&c, and known as edgers! It consists of a means for raising and lowering the upper feed-rolls, and for controlling the mechanism by which this is done; and

also of a means by which the feed-rolls are connected, so as to be driven simultaneously, notwithstanding the various distances to which they may be separated.

It further consists of certain details of construction, which will be more fully explained by reference to the accompanying drawings, in which Figure 1 is a front view of my machine. Fig. 2 is an end view taken from the left, showing the belt and tightener. Fig. 3 is an end view taken from the right, showing the actuating-gear for lifting the feed-rolls and the extension-gear. Fig. 4 is avertical section. Fig. 5 is a detail of construction. Fig. 6 is a view of the driving mechanism. Fig. 7 is an end view of part of the same.

A are the end frames, which are united by stout rods B, extending between them.

C is the saw shaft or arbor, with the adjustable saws D mounted uponit, having the grooved collars'E.

F is the slotted beam extending across the front, and in which the setting-levers are fitted to slide from side to side and carry the 40 saws, these parts not differing, essentially, from my Patents Nos. 227,926 and 258, 94.6.

The feed-rolls G G, between which the lumber is passed, and by which it is carried to the saws and removed from them, are also similarly arranged, the upper set, G, being vertieally adjusted to suit the thickness of the lumber which is to pass through by means of cocentric or crank arms or disks H and connecting-rods I, which connect the cranks with the sliding j ournal-boxes J, in which the upperroll shafts turn. In order to raise and lower (No model.)

it to mesh with the gears L, between which it' lies, so that when this pinion is turned the gears will be turned, and the feed-rolls will be simultaneously raised or lowered. The pinion-shaft M has a flanged pulley, O, fixed to its opposite end, and another flanged pulley, P,is fixed to a shaft, Q, which extends across the top of the frame, so that the loose belt B may pass around these pulleys. The shaft Q has a driving-pulley, S, upon its opposite end.

A shaft,T, extends across the frame in front of and below the shaft Q, and has an arm, U, upon one end, carrying atightening-pulley,V, which may be pressed against the belt R to make it run tight upon the pulleys O P.

On the shaft T, which is suitably journaled to the curved bar A, is secured a downwardlyprojecting arm, U, carrying a tighteningpulley, V, and to said shaft T are secured upwardly-extending arms W, which are connected together by means of arod, X, extending from one to the other of said arms across the front of the frame. By drawing the rod X toward the front of the frame A, it at the same time causes the tightening-pulley V to press against the belt R, which passes around the pulleys O and P, thus causing a frictional resistance, which forces them to be revolved, and in turn revolving the disks H H, connected to the sliding journal-boxes J J by the rods I I, the above causing the pinions a b to be revolved, which raises all the rolls, so that the lumber may be introduced. They are then allowed to drop upon it by gravitation, and as they are caused to rotate they feed it to the sawsand discharge it upon the other side after being cut.

In order to drive the rolls, the lower ones, G, have belt-pulleys upon their shafts, and the upper ones, which are movable vertically to and from them, are provided with pinions 0; upon one end, while intermediate pinions, 12, standing at one side, are connected with each other and with the pinions a by link 0, which hold them always in gear, but allow them to follow the rolls in their vertical movements, so that, whatever their position, the pinions will always mesh and drive the upper rolls with the lower ones.

The machinery is driven by a main belt passing around a drum or pulley upon the sawarbor, as shown at d. A belt, e, passes from a pulley on the saw-arbor around the pulley S on the shaft Q, and thus drives it. Pulleys are keyed to this shaft, and a straight belt from one and a crossed belt from the other pass around corresponding pulleysf and g, running loosely on a counter-shaft, h, above. From a pulleyon the end of this shaft, belt 1' passes around both of the pulleys j on the ends of the lower rolls, G, and thus drives them both in the same direction. A clutch, k, slides upon a fcatherin the counter-shaft h, and is moved by alever, I, so as to engage either the pulley f or g at will. This will drive the rolls forward or back, so that if the saws become clogged, or anything happens to make it necessary, the lumber may be withdrawn by reversing the rolls.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a gang-edger, means for raising and depressing the upper feed-rolls simultaneously, consisting of eccentric or cranked disks connected with the vertically-sliding boxes of the upper feed-rolls, the disk-shafts each having a gear-wheel upon one of its ends, both of which gears are engaged by a pinion upon a centrally-placed shaft, substantially as herein described.

2. In a gang-edger, and in eombinationwith the vertically-movable feed-rolls, cranks and conneetingrods, gears, and pinion, as shown, a flanged belt-pulley upon the pinion-shaft, a flanged pulley upon the'drivingshaft, and a loose belt connecting the two togcther,with the tightening-pulley V, mounted upon the arm U of the shaft T, and the handle bar or lever X, substantially as herein described.

3. In a gang-edger, and in combination with the two sets of feed-rolls and the intermediate saws, means for driving said rolls and reversing them, consisting of the shaft Q, driven by belt from the saw-arbor, and the pulleys f and g, driven in opposite directions by belts from the shaft, together with a belt, 13, passing from a pulley on the eountershaft h around pulleys upon the ends of the lower feed-roll shafts, and a clutch and lever by which it may be engaged with either of the pulleys f or 1, substantially as herein described.

In witness whereof I have hereunto set my hand.

J. A. ROBE. Witnesses:

4 S. H. NoURsE,

J 0s. A. BAYLESS. 

